The Maricopa County Sheriff's Office says a deputy was hospitalized after being seriously injured after being struck by a vehicle at an accident scene in Queen Creek on the southeastern outskirts of metro Phoenix.

Authorities say they're investigating an incident in which a U.S. Border Patrol agent became ill after being exposed to an unknown substance during an encounter with a person suspected of being in the country illegally.

A federal jury has convicted an Arizona man for the first-degree murder of his girlfriend, and of other violent crimes including using a machete to assault two Navajo Nation police officers who arrived to investigate the killing.

A high-powered rifle a man used to fire at state troopers during a pursuit before he was fatally shot on a Phoenix freeway was stolen from the Maricopa County Sheriff's office, authorities said Wednesday.

The creation of a state task force three years ago included a promise from the director of the Arizona Department of Public Safety that state highways near the border would be patrolled around the clock.